annotate Meerwald/cmp_zhu_sig.c @ 1:647ab0f05aae v0.4

drop, not needed
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Tue, 14 Aug 2007 19:58:25 +0200
parents be303a3f5ea8
children f83ef905a63d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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1 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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2
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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3 char *progname;
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4
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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5 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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6 fprintf(stderr, "usage: %s [-h] [-C] [-o file] [-v n] -s file file\n\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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7 fprintf(stderr, "\t-C\t\toutput correlation only\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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8 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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9 fprintf(stderr, "\t-o file\t\toutput file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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10 fprintf(stderr, "\t-v n\t\tverbosity level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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11 fprintf(stderr, "\t-s file\t\toriginal signature file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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12 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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13 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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14
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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15 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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16
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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17 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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18 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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19 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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20
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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21 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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22 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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23 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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24
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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25 int c, i, j, n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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26 int in_level;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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27 double *cumul_watermark, *orig_watermark;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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28 int *cumul_watermark_count;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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29 int sig_n, in_n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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30 double sig_a;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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31 int sig_l;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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32 int sig_e, sig_f;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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33 char line[32];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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34 double correlation, maxcorrelation;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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35 double s1, s2, s3;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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36
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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37 int verbose = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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38 int correlation_only = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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39
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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40 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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41
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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42 while ((c = getopt(argc, argv, "h?Co:s:v:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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43 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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44 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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45 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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46 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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47 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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48 case 'C':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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49 correlation_only = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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50 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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51 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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52 if ((out = fopen(optarg, "w")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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53 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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54 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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55 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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56 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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57 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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58 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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59 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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60 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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61 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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62 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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63 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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64 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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65 case 'v':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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66 verbose = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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67 if (verbose < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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68 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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69 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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70 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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71 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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72 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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73 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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74
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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75 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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76 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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77
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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78 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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79 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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80 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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81 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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82
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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83 if (argc == 1 && *argv[0] != '-')
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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84 if ((in = fopen(argv[0], "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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85 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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86 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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87 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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88 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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89 strcpy(input_name, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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90
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91 if (!sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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92 fprintf(stderr, "%s: original signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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93 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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94 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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95
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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96 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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97 if (strspn(line, "ZHSG") < 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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98 fprintf(stderr, "%s: original signature file %s invalid\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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99 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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100 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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101
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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102 fgets(line, sizeof(line), in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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103 if (strspn(line, "ZHWM") < 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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104 fprintf(stderr, "%s: watermark file %s invalid\n", progname, input_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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105 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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106 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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107
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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108 fscanf(sig, "%d\n", &sig_n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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109 fscanf(in, "%d\n", &in_n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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110 if (sig_n != in_n) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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111 fprintf(stderr, "%s: watermark length mismatch (original %d, input %d)\n", progname, sig_n, in_n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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112 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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113 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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114 if (sig_n <= 0 || sig_n > 32000) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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115 fprintf(stderr, "%s: invalid original watermark length %d\n", progname, sig_n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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116 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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117 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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118 if (in_n != sig_n) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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119 fprintf(stderr, "%s: invalid watermark length %d, does not match signature length\n", progname, in_n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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120 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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121 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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122
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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123 fscanf(sig, "%lf\n", &sig_a);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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124 fscanf(sig, "%d\n", &sig_l);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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125 fscanf(sig, "%d\n", &sig_e);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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126 fscanf(sig, "%d\n", &sig_f);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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127 fscanf(sig, "%*[^\n\r]\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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128
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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129 orig_watermark = malloc(sig_n * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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130 for (i = 0; i < sig_n; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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131 fscanf(sig, "%lf\n", &orig_watermark[i]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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132 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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133
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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134 fscanf(in, "%d\n", &in_level);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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135
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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136 cumul_watermark = malloc(in_n * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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137 cumul_watermark_count = malloc(in_n * sizeof(int));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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138
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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139 for (i = 0; i < in_n; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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140 cumul_watermark_count[i] = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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141 cumul_watermark[i] = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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142 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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143
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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144 /*
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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145 * normalized correlation
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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146 * Craver, S., "Can Invisible Watermarks Resolve Rightful Ownership?", IBM Research Report, 1996, p. 5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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147 */
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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148 maxcorrelation = -10000.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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149 for (i = 0; i < in_level; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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150 fscanf(in, "%d\n", &n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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152 s1 = s2 = s3 = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153 for (j = 0; j < n; j++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 double in_x, sig_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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156 sig_x = orig_watermark[j];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 fscanf(in, "%lf\n", &in_x);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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158
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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159 s1 += sig_x * in_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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160 s2 += in_x * in_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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161 s3 += sig_x * sig_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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162
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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163 if (verbose > 2)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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164 fprintf(stderr, "%s: level %d; orig %f input %f\n", progname, i, sig_x, in_x);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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165
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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166 cumul_watermark[j % in_n] += in_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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167 cumul_watermark_count[j % in_n]++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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168 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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169
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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170 correlation = s1 / sqrt(s2 * s3);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 if (correlation > maxcorrelation)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 maxcorrelation = correlation;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 if (!correlation_only)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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175 fprintf(out, "%s: correlation level %d: %f\n", progname, i, correlation);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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177
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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178 s1 = s2 = s3 = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 for (i = 0; i < in_n; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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180 double in_x, sig_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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181
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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182 in_x = cumul_watermark[i] / (double) cumul_watermark_count[i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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183 sig_x = orig_watermark[i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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184
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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185 s1 += sig_x * in_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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186 s2 += in_x * in_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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187 s3 += sig_x * sig_x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 correlation = s1 / sqrt(s2 * s3);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 if (!correlation_only)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 fprintf(out, "%s: cumultative correlation: %f\n", progname, correlation);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 if (correlation > maxcorrelation)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 maxcorrelation = correlation;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
197 if (!correlation_only)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
198 fprintf(out, "%s: max. correlation: %f\n", progname, maxcorrelation);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
199 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
200 fprintf(out, "%f\n", maxcorrelation);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
202 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
204
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
205 free(orig_watermark);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
206 free(cumul_watermark);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
207 free(cumul_watermark_count);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
208
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
209 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
210 }

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.